<div>
  <h3>TestDom2</h3>
  <input #colorIndex type='text' />
  <button (click)='changeColor(colorIndex.value)'>change color</button>
  <div id="kk1" style="width: 100px;height: 100px;background: white;"></div>
  <div id="kk2" style="width: 100px;height: 100px;background: white;"></div>
  <div class="gg1" style="width: 100px;height: 100px;background: white;"></div>
  <div class="gg2" style="width: 100px;height: 100px;background: white;"></div>
  <test-dom2-child></test-dom2-child>
</div>
